Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * scan.c - support for transforming the ACPI namespace into individual objects | |
3 | */ | |
4 | ||
5 | #include <linux/module.h> | |
6 | #include <linux/init.h> | |
5a0e3ad6 | 7 | #include <linux/slab.h> |
9b6d97b6 | 8 | #include <linux/kernel.h> |
1da177e4 | 9 | #include <linux/acpi.h> |
74523c90 AK |
10 | #include <linux/signal.h> |
11 | #include <linux/kthread.h> | |
222e82ac | 12 | #include <linux/dmi.h> |
d1efe3c3 | 13 | #include <linux/nls.h> |
1da177e4 LT |
14 | |
15 | #include <acpi/acpi_drivers.h> | |
1da177e4 | 16 | |
e60cc7a6 BH |
17 | #include "internal.h" |
18 | ||
1da177e4 | 19 | #define _COMPONENT ACPI_BUS_COMPONENT |
f52fd66d | 20 | ACPI_MODULE_NAME("scan"); |
1da177e4 | 21 | #define STRUCT_TO_INT(s) (*((int*)&s)) |
4be44fcd | 22 | extern struct acpi_device *acpi_root; |
1da177e4 LT |
23 | |
24 | #define ACPI_BUS_CLASS "system_bus" | |
29b71a1c | 25 | #define ACPI_BUS_HID "LNXSYBUS" |
1da177e4 LT |
26 | #define ACPI_BUS_DEVICE_NAME "System Bus" |
27 | ||
859ac9a4 BH |
28 | #define ACPI_IS_ROOT_DEVICE(device) (!(device)->parent) |
29 | ||
620e112c | 30 | static const char *dummy_hid = "device"; |
2b2ae7c7 | 31 | |
1da177e4 | 32 | static LIST_HEAD(acpi_device_list); |
e49bd2dd | 33 | static LIST_HEAD(acpi_bus_id_list); |
9090589d | 34 | DEFINE_MUTEX(acpi_device_lock); |
1da177e4 LT |
35 | LIST_HEAD(acpi_wakeup_device_list); |
36 | ||
e49bd2dd | 37 | struct acpi_device_bus_id{ |
bb095854 | 38 | char bus_id[15]; |
e49bd2dd ZR |
39 | unsigned int instance_no; |
40 | struct list_head node; | |
1da177e4 | 41 | }; |
29b71a1c TR |
42 | |
43 | /* | |
44 | * Creates hid/cid(s) string needed for modalias and uevent | |
45 | * e.g. on a device with hid:IBM0001 and cid:ACPI0001 you get: | |
46 | * char *modalias: "acpi:IBM0001:ACPI0001" | |
47 | */ | |
b3e572d2 AB |
48 | static int create_modalias(struct acpi_device *acpi_dev, char *modalias, |
49 | int size) | |
50 | { | |
29b71a1c | 51 | int len; |
5c9fcb5d | 52 | int count; |
7f47fa6c | 53 | struct acpi_hardware_id *id; |
29b71a1c | 54 | |
2b2ae7c7 TR |
55 | if (list_empty(&acpi_dev->pnp.ids)) |
56 | return 0; | |
57 | ||
5c9fcb5d | 58 | len = snprintf(modalias, size, "acpi:"); |
29b71a1c TR |
59 | size -= len; |
60 | ||
7f47fa6c BH |
61 | list_for_each_entry(id, &acpi_dev->pnp.ids, list) { |
62 | count = snprintf(&modalias[len], size, "%s:", id->id); | |
5c9fcb5d ZR |
63 | if (count < 0 || count >= size) |
64 | return -EINVAL; | |
65 | len += count; | |
66 | size -= count; | |
67 | } | |
68 | ||
29b71a1c TR |
69 | modalias[len] = '\0'; |
70 | return len; | |
71 | } | |
72 | ||
73 | static ssize_t | |
74 | acpi_device_modalias_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
75 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
76 | int len; | |
77 | ||
78 | /* Device has no HID and no CID or string is >1024 */ | |
79 | len = create_modalias(acpi_dev, buf, 1024); | |
80 | if (len <= 0) | |
81 | return 0; | |
82 | buf[len++] = '\n'; | |
83 | return len; | |
84 | } | |
85 | static DEVICE_ATTR(modalias, 0444, acpi_device_modalias_show, NULL); | |
86 | ||
c4753e57 TK |
87 | /** |
88 | * acpi_bus_hot_remove_device: hot-remove a device and its children | |
89 | * @context: struct acpi_eject_event pointer (freed in this func) | |
90 | * | |
91 | * Hot-remove a device and its children. This function frees up the | |
92 | * memory space passed by arg context, so that the caller may call | |
93 | * this function asynchronously through acpi_os_hotplug_execute(). | |
94 | */ | |
95 | void acpi_bus_hot_remove_device(void *context) | |
1da177e4 | 96 | { |
c4753e57 | 97 | struct acpi_eject_event *ej_event = (struct acpi_eject_event *) context; |
26d46867 | 98 | struct acpi_device *device; |
c4753e57 | 99 | acpi_handle handle = ej_event->handle; |
b3c450c3 | 100 | acpi_handle temp; |
1da177e4 LT |
101 | struct acpi_object_list arg_list; |
102 | union acpi_object arg; | |
103 | acpi_status status = AE_OK; | |
c4753e57 | 104 | u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE; /* default */ |
1da177e4 | 105 | |
26d46867 | 106 | if (acpi_bus_get_device(handle, &device)) |
c4753e57 | 107 | goto err_out; |
26d46867 ZR |
108 | |
109 | if (!device) | |
c4753e57 | 110 | goto err_out; |
26d46867 ZR |
111 | |
112 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
0794469d | 113 | "Hot-removing device %s...\n", dev_name(&device->dev))); |
26d46867 ZR |
114 | |
115 | if (acpi_bus_trim(device, 1)) { | |
55ac9a01 LM |
116 | printk(KERN_ERR PREFIX |
117 | "Removing device failed\n"); | |
c4753e57 | 118 | goto err_out; |
26d46867 | 119 | } |
1da177e4 | 120 | |
b3c450c3 TK |
121 | /* device has been freed */ |
122 | device = NULL; | |
123 | ||
26d46867 ZR |
124 | /* power off device */ |
125 | status = acpi_evaluate_object(handle, "_PS3", NULL, NULL); | |
126 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) | |
55ac9a01 LM |
127 | printk(KERN_WARNING PREFIX |
128 | "Power-off device failed\n"); | |
26d46867 | 129 | |
b3c450c3 | 130 | if (ACPI_SUCCESS(acpi_get_handle(handle, "_LCK", &temp))) { |
1da177e4 LT |
131 | arg_list.count = 1; |
132 | arg_list.pointer = &arg; | |
133 | arg.type = ACPI_TYPE_INTEGER; | |
134 | arg.integer.value = 0; | |
135 | acpi_evaluate_object(handle, "_LCK", &arg_list, NULL); | |
136 | } | |
1da177e4 | 137 | |
1da177e4 LT |
138 | arg_list.count = 1; |
139 | arg_list.pointer = &arg; | |
140 | arg.type = ACPI_TYPE_INTEGER; | |
141 | arg.integer.value = 1; | |
1da177e4 | 142 | |
1da177e4 LT |
143 | /* |
144 | * TBD: _EJD support. | |
145 | */ | |
1da177e4 | 146 | status = acpi_evaluate_object(handle, "_EJ0", &arg_list, NULL); |
c4753e57 TK |
147 | if (ACPI_FAILURE(status)) { |
148 | if (status != AE_NOT_FOUND) | |
149 | printk(KERN_WARNING PREFIX | |
150 | "Eject device failed\n"); | |
151 | goto err_out; | |
152 | } | |
1da177e4 | 153 | |
c4753e57 TK |
154 | kfree(context); |
155 | return; | |
1da177e4 | 156 | |
c4753e57 TK |
157 | err_out: |
158 | /* Inform firmware the hot-remove operation has completed w/ error */ | |
159 | (void) acpi_evaluate_hotplug_ost(handle, | |
160 | ej_event->event, ost_code, NULL); | |
161 | kfree(context); | |
c8d72a5e | 162 | return; |
1da177e4 LT |
163 | } |
164 | ||
1da177e4 | 165 | static ssize_t |
f883d9db PM |
166 | acpi_eject_store(struct device *d, struct device_attribute *attr, |
167 | const char *buf, size_t count) | |
1da177e4 | 168 | { |
4be44fcd | 169 | int ret = count; |
4be44fcd | 170 | acpi_status status; |
4be44fcd | 171 | acpi_object_type type = 0; |
f883d9db | 172 | struct acpi_device *acpi_device = to_acpi_device(d); |
c4753e57 | 173 | struct acpi_eject_event *ej_event; |
1da177e4 | 174 | |
1da177e4 LT |
175 | if ((!count) || (buf[0] != '1')) { |
176 | return -EINVAL; | |
177 | } | |
1da177e4 | 178 | #ifndef FORCE_EJECT |
f883d9db | 179 | if (acpi_device->driver == NULL) { |
1da177e4 LT |
180 | ret = -ENODEV; |
181 | goto err; | |
182 | } | |
183 | #endif | |
f883d9db PM |
184 | status = acpi_get_type(acpi_device->handle, &type); |
185 | if (ACPI_FAILURE(status) || (!acpi_device->flags.ejectable)) { | |
1da177e4 LT |
186 | ret = -ENODEV; |
187 | goto err; | |
188 | } | |
1da177e4 | 189 | |
c4753e57 TK |
190 | ej_event = kmalloc(sizeof(*ej_event), GFP_KERNEL); |
191 | if (!ej_event) { | |
192 | ret = -ENOMEM; | |
193 | goto err; | |
194 | } | |
195 | ||
196 | ej_event->handle = acpi_device->handle; | |
197 | if (acpi_device->flags.eject_pending) { | |
198 | /* event originated from ACPI eject notification */ | |
199 | ej_event->event = ACPI_NOTIFY_EJECT_REQUEST; | |
200 | acpi_device->flags.eject_pending = 0; | |
201 | } else { | |
202 | /* event originated from user */ | |
203 | ej_event->event = ACPI_OST_EC_OSPM_EJECT; | |
204 | (void) acpi_evaluate_hotplug_ost(ej_event->handle, | |
205 | ej_event->event, ACPI_OST_SC_EJECT_IN_PROGRESS, NULL); | |
206 | } | |
207 | ||
208 | acpi_os_hotplug_execute(acpi_bus_hot_remove_device, (void *)ej_event); | |
74523c90 | 209 | err: |
1da177e4 | 210 | return ret; |
1da177e4 LT |
211 | } |
212 | ||
f883d9db | 213 | static DEVICE_ATTR(eject, 0200, NULL, acpi_eject_store); |
1da177e4 | 214 | |
e49bd2dd ZR |
215 | static ssize_t |
216 | acpi_device_hid_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
217 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
1da177e4 | 218 | |
ea8d82fd | 219 | return sprintf(buf, "%s\n", acpi_device_hid(acpi_dev)); |
1da177e4 | 220 | } |
e49bd2dd | 221 | static DEVICE_ATTR(hid, 0444, acpi_device_hid_show, NULL); |
1da177e4 | 222 | |
e49bd2dd ZR |
223 | static ssize_t |
224 | acpi_device_path_show(struct device *dev, struct device_attribute *attr, char *buf) { | |
225 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
226 | struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL}; | |
227 | int result; | |
1da177e4 | 228 | |
e49bd2dd | 229 | result = acpi_get_name(acpi_dev->handle, ACPI_FULL_PATHNAME, &path); |
0c526d96 | 230 | if (result) |
e49bd2dd | 231 | goto end; |
1da177e4 | 232 | |
e49bd2dd ZR |
233 | result = sprintf(buf, "%s\n", (char*)path.pointer); |
234 | kfree(path.pointer); | |
0c526d96 | 235 | end: |
e49bd2dd | 236 | return result; |
1da177e4 | 237 | } |
e49bd2dd | 238 | static DEVICE_ATTR(path, 0444, acpi_device_path_show, NULL); |
1da177e4 | 239 | |
d1efe3c3 LO |
240 | /* sysfs file that shows description text from the ACPI _STR method */ |
241 | static ssize_t description_show(struct device *dev, | |
242 | struct device_attribute *attr, | |
243 | char *buf) { | |
244 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
245 | int result; | |
246 | ||
247 | if (acpi_dev->pnp.str_obj == NULL) | |
248 | return 0; | |
249 | ||
250 | /* | |
251 | * The _STR object contains a Unicode identifier for a device. | |
252 | * We need to convert to utf-8 so it can be displayed. | |
253 | */ | |
254 | result = utf16s_to_utf8s( | |
255 | (wchar_t *)acpi_dev->pnp.str_obj->buffer.pointer, | |
256 | acpi_dev->pnp.str_obj->buffer.length, | |
257 | UTF16_LITTLE_ENDIAN, buf, | |
258 | PAGE_SIZE); | |
259 | ||
260 | buf[result++] = '\n'; | |
261 | ||
262 | return result; | |
263 | } | |
264 | static DEVICE_ATTR(description, 0444, description_show, NULL); | |
265 | ||
e49bd2dd | 266 | static int acpi_device_setup_files(struct acpi_device *dev) |
1da177e4 | 267 | { |
d1efe3c3 | 268 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; |
f883d9db PM |
269 | acpi_status status; |
270 | acpi_handle temp; | |
e49bd2dd | 271 | int result = 0; |
1da177e4 LT |
272 | |
273 | /* | |
e49bd2dd | 274 | * Devices gotten from FADT don't have a "path" attribute |
1da177e4 | 275 | */ |
0c526d96 | 276 | if (dev->handle) { |
e49bd2dd | 277 | result = device_create_file(&dev->dev, &dev_attr_path); |
0c526d96 | 278 | if (result) |
e49bd2dd | 279 | goto end; |
1da177e4 LT |
280 | } |
281 | ||
2b2ae7c7 TR |
282 | if (!list_empty(&dev->pnp.ids)) { |
283 | result = device_create_file(&dev->dev, &dev_attr_hid); | |
284 | if (result) | |
285 | goto end; | |
1da177e4 | 286 | |
2b2ae7c7 TR |
287 | result = device_create_file(&dev->dev, &dev_attr_modalias); |
288 | if (result) | |
289 | goto end; | |
290 | } | |
29b71a1c | 291 | |
d1efe3c3 LO |
292 | /* |
293 | * If device has _STR, 'description' file is created | |
294 | */ | |
295 | status = acpi_get_handle(dev->handle, "_STR", &temp); | |
296 | if (ACPI_SUCCESS(status)) { | |
297 | status = acpi_evaluate_object(dev->handle, "_STR", | |
298 | NULL, &buffer); | |
299 | if (ACPI_FAILURE(status)) | |
300 | buffer.pointer = NULL; | |
301 | dev->pnp.str_obj = buffer.pointer; | |
302 | result = device_create_file(&dev->dev, &dev_attr_description); | |
303 | if (result) | |
304 | goto end; | |
305 | } | |
306 | ||
e49bd2dd ZR |
307 | /* |
308 | * If device has _EJ0, 'eject' file is created that is used to trigger | |
309 | * hot-removal function from userland. | |
310 | */ | |
f883d9db PM |
311 | status = acpi_get_handle(dev->handle, "_EJ0", &temp); |
312 | if (ACPI_SUCCESS(status)) | |
e49bd2dd | 313 | result = device_create_file(&dev->dev, &dev_attr_eject); |
0c526d96 | 314 | end: |
e49bd2dd | 315 | return result; |
1da177e4 LT |
316 | } |
317 | ||
f883d9db | 318 | static void acpi_device_remove_files(struct acpi_device *dev) |
1da177e4 | 319 | { |
f883d9db PM |
320 | acpi_status status; |
321 | acpi_handle temp; | |
1da177e4 | 322 | |
f883d9db | 323 | /* |
d1efe3c3 LO |
324 | * If device has _STR, remove 'description' file |
325 | */ | |
326 | status = acpi_get_handle(dev->handle, "_STR", &temp); | |
327 | if (ACPI_SUCCESS(status)) { | |
328 | kfree(dev->pnp.str_obj); | |
329 | device_remove_file(&dev->dev, &dev_attr_description); | |
330 | } | |
331 | /* | |
332 | * If device has _EJ0, remove 'eject' file. | |
f883d9db PM |
333 | */ |
334 | status = acpi_get_handle(dev->handle, "_EJ0", &temp); | |
335 | if (ACPI_SUCCESS(status)) | |
336 | device_remove_file(&dev->dev, &dev_attr_eject); | |
1da177e4 | 337 | |
1131b938 BH |
338 | device_remove_file(&dev->dev, &dev_attr_modalias); |
339 | device_remove_file(&dev->dev, &dev_attr_hid); | |
0c526d96 | 340 | if (dev->handle) |
e49bd2dd | 341 | device_remove_file(&dev->dev, &dev_attr_path); |
1da177e4 | 342 | } |
1da177e4 | 343 | /* -------------------------------------------------------------------------- |
9e89dde2 | 344 | ACPI Bus operations |
1da177e4 | 345 | -------------------------------------------------------------------------- */ |
29b71a1c TR |
346 | |
347 | int acpi_match_device_ids(struct acpi_device *device, | |
348 | const struct acpi_device_id *ids) | |
349 | { | |
350 | const struct acpi_device_id *id; | |
7f47fa6c | 351 | struct acpi_hardware_id *hwid; |
29b71a1c | 352 | |
39a0ad87 ZY |
353 | /* |
354 | * If the device is not present, it is unnecessary to load device | |
355 | * driver for it. | |
356 | */ | |
357 | if (!device->status.present) | |
358 | return -ENODEV; | |
359 | ||
7f47fa6c BH |
360 | for (id = ids; id->id[0]; id++) |
361 | list_for_each_entry(hwid, &device->pnp.ids, list) | |
362 | if (!strcmp((char *) id->id, hwid->id)) | |
29b71a1c | 363 | return 0; |
29b71a1c TR |
364 | |
365 | return -ENOENT; | |
366 | } | |
367 | EXPORT_SYMBOL(acpi_match_device_ids); | |
368 | ||
7f47fa6c BH |
369 | static void acpi_free_ids(struct acpi_device *device) |
370 | { | |
371 | struct acpi_hardware_id *id, *tmp; | |
372 | ||
373 | list_for_each_entry_safe(id, tmp, &device->pnp.ids, list) { | |
374 | kfree(id->id); | |
375 | kfree(id); | |
376 | } | |
377 | } | |
378 | ||
1890a97a | 379 | static void acpi_device_release(struct device *dev) |
1da177e4 | 380 | { |
1890a97a | 381 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
1da177e4 | 382 | |
7f47fa6c | 383 | acpi_free_ids(acpi_dev); |
ccf78040 | 384 | kfree(acpi_dev->pnp.unique_id); |
1890a97a | 385 | kfree(acpi_dev); |
1da177e4 LT |
386 | } |
387 | ||
5d9464a4 | 388 | static int acpi_bus_match(struct device *dev, struct device_driver *drv) |
9e89dde2 | 389 | { |
5d9464a4 PM |
390 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
391 | struct acpi_driver *acpi_drv = to_acpi_driver(drv); | |
1da177e4 | 392 | |
29b71a1c | 393 | return !acpi_match_device_ids(acpi_dev, acpi_drv->ids); |
5d9464a4 | 394 | } |
1da177e4 | 395 | |
7eff2e7a | 396 | static int acpi_device_uevent(struct device *dev, struct kobj_uevent_env *env) |
1da177e4 | 397 | { |
5d9464a4 | 398 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
7eff2e7a | 399 | int len; |
5d9464a4 | 400 | |
2b2ae7c7 TR |
401 | if (list_empty(&acpi_dev->pnp.ids)) |
402 | return 0; | |
403 | ||
7eff2e7a KS |
404 | if (add_uevent_var(env, "MODALIAS=")) |
405 | return -ENOMEM; | |
406 | len = create_modalias(acpi_dev, &env->buf[env->buflen - 1], | |
407 | sizeof(env->buf) - env->buflen); | |
408 | if (len >= (sizeof(env->buf) - env->buflen)) | |
409 | return -ENOMEM; | |
410 | env->buflen += len; | |
9e89dde2 | 411 | return 0; |
1da177e4 LT |
412 | } |
413 | ||
46ec8598 BH |
414 | static void acpi_device_notify(acpi_handle handle, u32 event, void *data) |
415 | { | |
416 | struct acpi_device *device = data; | |
417 | ||
418 | device->driver->ops.notify(device, event); | |
419 | } | |
420 | ||
421 | static acpi_status acpi_device_notify_fixed(void *data) | |
422 | { | |
423 | struct acpi_device *device = data; | |
424 | ||
53de5356 BH |
425 | /* Fixed hardware devices have no handles */ |
426 | acpi_device_notify(NULL, ACPI_FIXED_HARDWARE_EVENT, device); | |
46ec8598 BH |
427 | return AE_OK; |
428 | } | |
429 | ||
430 | static int acpi_device_install_notify_handler(struct acpi_device *device) | |
431 | { | |
432 | acpi_status status; | |
46ec8598 | 433 | |
ccba2a36 | 434 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) |
46ec8598 BH |
435 | status = |
436 | acpi_install_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, | |
437 | acpi_device_notify_fixed, | |
438 | device); | |
ccba2a36 | 439 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) |
46ec8598 BH |
440 | status = |
441 | acpi_install_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, | |
442 | acpi_device_notify_fixed, | |
443 | device); | |
444 | else | |
445 | status = acpi_install_notify_handler(device->handle, | |
446 | ACPI_DEVICE_NOTIFY, | |
447 | acpi_device_notify, | |
448 | device); | |
449 | ||
450 | if (ACPI_FAILURE(status)) | |
451 | return -EINVAL; | |
452 | return 0; | |
453 | } | |
454 | ||
455 | static void acpi_device_remove_notify_handler(struct acpi_device *device) | |
456 | { | |
ccba2a36 | 457 | if (device->device_type == ACPI_BUS_TYPE_POWER_BUTTON) |
46ec8598 BH |
458 | acpi_remove_fixed_event_handler(ACPI_EVENT_POWER_BUTTON, |
459 | acpi_device_notify_fixed); | |
ccba2a36 | 460 | else if (device->device_type == ACPI_BUS_TYPE_SLEEP_BUTTON) |
46ec8598 BH |
461 | acpi_remove_fixed_event_handler(ACPI_EVENT_SLEEP_BUTTON, |
462 | acpi_device_notify_fixed); | |
463 | else | |
464 | acpi_remove_notify_handler(device->handle, ACPI_DEVICE_NOTIFY, | |
465 | acpi_device_notify); | |
466 | } | |
467 | ||
5d9464a4 PM |
468 | static int acpi_bus_driver_init(struct acpi_device *, struct acpi_driver *); |
469 | static int acpi_start_single_object(struct acpi_device *); | |
470 | static int acpi_device_probe(struct device * dev) | |
1da177e4 | 471 | { |
5d9464a4 PM |
472 | struct acpi_device *acpi_dev = to_acpi_device(dev); |
473 | struct acpi_driver *acpi_drv = to_acpi_driver(dev->driver); | |
474 | int ret; | |
475 | ||
476 | ret = acpi_bus_driver_init(acpi_dev, acpi_drv); | |
477 | if (!ret) { | |
c4168bff LS |
478 | if (acpi_dev->bus_ops.acpi_op_start) |
479 | acpi_start_single_object(acpi_dev); | |
46ec8598 BH |
480 | |
481 | if (acpi_drv->ops.notify) { | |
482 | ret = acpi_device_install_notify_handler(acpi_dev); | |
483 | if (ret) { | |
46ec8598 BH |
484 | if (acpi_drv->ops.remove) |
485 | acpi_drv->ops.remove(acpi_dev, | |
486 | acpi_dev->removal_type); | |
487 | return ret; | |
488 | } | |
489 | } | |
490 | ||
5d9464a4 PM |
491 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
492 | "Found driver [%s] for device [%s]\n", | |
493 | acpi_drv->name, acpi_dev->pnp.bus_id)); | |
494 | get_device(dev); | |
495 | } | |
496 | return ret; | |
497 | } | |
1da177e4 | 498 | |
5d9464a4 PM |
499 | static int acpi_device_remove(struct device * dev) |
500 | { | |
501 | struct acpi_device *acpi_dev = to_acpi_device(dev); | |
502 | struct acpi_driver *acpi_drv = acpi_dev->driver; | |
503 | ||
504 | if (acpi_drv) { | |
46ec8598 BH |
505 | if (acpi_drv->ops.notify) |
506 | acpi_device_remove_notify_handler(acpi_dev); | |
5d9464a4 | 507 | if (acpi_drv->ops.remove) |
96333578 | 508 | acpi_drv->ops.remove(acpi_dev, acpi_dev->removal_type); |
1da177e4 | 509 | } |
5d9464a4 | 510 | acpi_dev->driver = NULL; |
db89b4f0 | 511 | acpi_dev->driver_data = NULL; |
1da177e4 | 512 | |
5d9464a4 | 513 | put_device(dev); |
9e89dde2 ZR |
514 | return 0; |
515 | } | |
1da177e4 | 516 | |
55955aad | 517 | struct bus_type acpi_bus_type = { |
9e89dde2 | 518 | .name = "acpi", |
5d9464a4 PM |
519 | .match = acpi_bus_match, |
520 | .probe = acpi_device_probe, | |
521 | .remove = acpi_device_remove, | |
522 | .uevent = acpi_device_uevent, | |
9e89dde2 ZR |
523 | }; |
524 | ||
66b7ed40 | 525 | static int acpi_device_register(struct acpi_device *device) |
1da177e4 | 526 | { |
4be44fcd | 527 | int result; |
e49bd2dd ZR |
528 | struct acpi_device_bus_id *acpi_device_bus_id, *new_bus_id; |
529 | int found = 0; | |
66b7ed40 | 530 | |
9e89dde2 ZR |
531 | /* |
532 | * Linkage | |
533 | * ------- | |
534 | * Link this device to its parent and siblings. | |
535 | */ | |
536 | INIT_LIST_HEAD(&device->children); | |
537 | INIT_LIST_HEAD(&device->node); | |
9e89dde2 | 538 | INIT_LIST_HEAD(&device->wakeup_list); |
1033f904 LT |
539 | INIT_LIST_HEAD(&device->physical_node_list); |
540 | mutex_init(&device->physical_node_lock); | |
1da177e4 | 541 | |
e49bd2dd ZR |
542 | new_bus_id = kzalloc(sizeof(struct acpi_device_bus_id), GFP_KERNEL); |
543 | if (!new_bus_id) { | |
544 | printk(KERN_ERR PREFIX "Memory allocation error\n"); | |
545 | return -ENOMEM; | |
1da177e4 | 546 | } |
e49bd2dd | 547 | |
9090589d | 548 | mutex_lock(&acpi_device_lock); |
e49bd2dd ZR |
549 | /* |
550 | * Find suitable bus_id and instance number in acpi_bus_id_list | |
551 | * If failed, create one and link it into acpi_bus_id_list | |
552 | */ | |
553 | list_for_each_entry(acpi_device_bus_id, &acpi_bus_id_list, node) { | |
1131b938 BH |
554 | if (!strcmp(acpi_device_bus_id->bus_id, |
555 | acpi_device_hid(device))) { | |
556 | acpi_device_bus_id->instance_no++; | |
e49bd2dd ZR |
557 | found = 1; |
558 | kfree(new_bus_id); | |
559 | break; | |
560 | } | |
1da177e4 | 561 | } |
0c526d96 | 562 | if (!found) { |
e49bd2dd | 563 | acpi_device_bus_id = new_bus_id; |
1131b938 | 564 | strcpy(acpi_device_bus_id->bus_id, acpi_device_hid(device)); |
e49bd2dd ZR |
565 | acpi_device_bus_id->instance_no = 0; |
566 | list_add_tail(&acpi_device_bus_id->node, &acpi_bus_id_list); | |
1da177e4 | 567 | } |
0794469d | 568 | dev_set_name(&device->dev, "%s:%02x", acpi_device_bus_id->bus_id, acpi_device_bus_id->instance_no); |
1da177e4 | 569 | |
33b57150 | 570 | if (device->parent) |
9e89dde2 | 571 | list_add_tail(&device->node, &device->parent->children); |
33b57150 | 572 | |
9e89dde2 ZR |
573 | if (device->wakeup.flags.valid) |
574 | list_add_tail(&device->wakeup_list, &acpi_wakeup_device_list); | |
9090589d | 575 | mutex_unlock(&acpi_device_lock); |
1da177e4 | 576 | |
1890a97a | 577 | if (device->parent) |
66b7ed40 | 578 | device->dev.parent = &device->parent->dev; |
1890a97a | 579 | device->dev.bus = &acpi_bus_type; |
1890a97a | 580 | device->dev.release = &acpi_device_release; |
8b12b922 | 581 | result = device_register(&device->dev); |
0c526d96 | 582 | if (result) { |
8b12b922 | 583 | dev_err(&device->dev, "Error registering device\n"); |
e49bd2dd | 584 | goto end; |
1da177e4 | 585 | } |
1da177e4 | 586 | |
e49bd2dd | 587 | result = acpi_device_setup_files(device); |
0c526d96 | 588 | if (result) |
0794469d KS |
589 | printk(KERN_ERR PREFIX "Error creating sysfs interface for device %s\n", |
590 | dev_name(&device->dev)); | |
1da177e4 | 591 | |
96333578 | 592 | device->removal_type = ACPI_BUS_REMOVAL_NORMAL; |
1da177e4 | 593 | return 0; |
0c526d96 | 594 | end: |
9090589d | 595 | mutex_lock(&acpi_device_lock); |
33b57150 | 596 | if (device->parent) |
e49bd2dd | 597 | list_del(&device->node); |
e49bd2dd | 598 | list_del(&device->wakeup_list); |
9090589d | 599 | mutex_unlock(&acpi_device_lock); |
e49bd2dd | 600 | return result; |
1da177e4 LT |
601 | } |
602 | ||
9e89dde2 ZR |
603 | static void acpi_device_unregister(struct acpi_device *device, int type) |
604 | { | |
9090589d | 605 | mutex_lock(&acpi_device_lock); |
33b57150 | 606 | if (device->parent) |
9e89dde2 | 607 | list_del(&device->node); |
1da177e4 | 608 | |
9e89dde2 | 609 | list_del(&device->wakeup_list); |
9090589d | 610 | mutex_unlock(&acpi_device_lock); |
1da177e4 | 611 | |
9e89dde2 | 612 | acpi_detach_data(device->handle, acpi_bus_data_handler); |
1890a97a | 613 | |
f883d9db | 614 | acpi_device_remove_files(device); |
1890a97a | 615 | device_unregister(&device->dev); |
1da177e4 LT |
616 | } |
617 | ||
9e89dde2 ZR |
618 | /* -------------------------------------------------------------------------- |
619 | Driver Management | |
620 | -------------------------------------------------------------------------- */ | |
1da177e4 | 621 | /** |
d758a8fa RD |
622 | * acpi_bus_driver_init - add a device to a driver |
623 | * @device: the device to add and initialize | |
624 | * @driver: driver for the device | |
625 | * | |
0c526d96 | 626 | * Used to initialize a device via its device driver. Called whenever a |
1890a97a | 627 | * driver is bound to a device. Invokes the driver's add() ops. |
1da177e4 LT |
628 | */ |
629 | static int | |
4be44fcd | 630 | acpi_bus_driver_init(struct acpi_device *device, struct acpi_driver *driver) |
1da177e4 | 631 | { |
4be44fcd | 632 | int result = 0; |
1da177e4 | 633 | |
1da177e4 | 634 | if (!device || !driver) |
d550d98d | 635 | return -EINVAL; |
1da177e4 LT |
636 | |
637 | if (!driver->ops.add) | |
d550d98d | 638 | return -ENOSYS; |
1da177e4 LT |
639 | |
640 | result = driver->ops.add(device); | |
641 | if (result) { | |
642 | device->driver = NULL; | |
db89b4f0 | 643 | device->driver_data = NULL; |
d550d98d | 644 | return result; |
1da177e4 LT |
645 | } |
646 | ||
647 | device->driver = driver; | |
648 | ||
649 | /* | |
650 | * TBD - Configuration Management: Assign resources to device based | |
651 | * upon possible configuration and currently allocated resources. | |
652 | */ | |
653 | ||
4be44fcd LB |
654 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
655 | "Driver successfully bound to device\n")); | |
d550d98d | 656 | return 0; |
3fb02738 RS |
657 | } |
658 | ||
8713cbef | 659 | static int acpi_start_single_object(struct acpi_device *device) |
3fb02738 RS |
660 | { |
661 | int result = 0; | |
662 | struct acpi_driver *driver; | |
663 | ||
3fb02738 RS |
664 | |
665 | if (!(driver = device->driver)) | |
d550d98d | 666 | return 0; |
3fb02738 | 667 | |
1da177e4 LT |
668 | if (driver->ops.start) { |
669 | result = driver->ops.start(device); | |
670 | if (result && driver->ops.remove) | |
671 | driver->ops.remove(device, ACPI_BUS_REMOVAL_NORMAL); | |
1da177e4 LT |
672 | } |
673 | ||
d550d98d | 674 | return result; |
1da177e4 LT |
675 | } |
676 | ||
9e89dde2 ZR |
677 | /** |
678 | * acpi_bus_register_driver - register a driver with the ACPI bus | |
679 | * @driver: driver being registered | |
680 | * | |
681 | * Registers a driver with the ACPI bus. Searches the namespace for all | |
682 | * devices that match the driver's criteria and binds. Returns zero for | |
683 | * success or a negative error status for failure. | |
684 | */ | |
685 | int acpi_bus_register_driver(struct acpi_driver *driver) | |
1da177e4 | 686 | { |
1890a97a | 687 | int ret; |
1da177e4 | 688 | |
9e89dde2 ZR |
689 | if (acpi_disabled) |
690 | return -ENODEV; | |
1890a97a PM |
691 | driver->drv.name = driver->name; |
692 | driver->drv.bus = &acpi_bus_type; | |
693 | driver->drv.owner = driver->owner; | |
1da177e4 | 694 | |
1890a97a PM |
695 | ret = driver_register(&driver->drv); |
696 | return ret; | |
9e89dde2 | 697 | } |
1da177e4 | 698 | |
9e89dde2 ZR |
699 | EXPORT_SYMBOL(acpi_bus_register_driver); |
700 | ||
701 | /** | |
702 | * acpi_bus_unregister_driver - unregisters a driver with the APIC bus | |
703 | * @driver: driver to unregister | |
704 | * | |
705 | * Unregisters a driver with the ACPI bus. Searches the namespace for all | |
706 | * devices that match the driver's criteria and unbinds. | |
707 | */ | |
708 | void acpi_bus_unregister_driver(struct acpi_driver *driver) | |
709 | { | |
1890a97a | 710 | driver_unregister(&driver->drv); |
9e89dde2 ZR |
711 | } |
712 | ||
713 | EXPORT_SYMBOL(acpi_bus_unregister_driver); | |
714 | ||
9e89dde2 ZR |
715 | /* -------------------------------------------------------------------------- |
716 | Device Enumeration | |
717 | -------------------------------------------------------------------------- */ | |
5c478f49 BH |
718 | static struct acpi_device *acpi_bus_get_parent(acpi_handle handle) |
719 | { | |
720 | acpi_status status; | |
721 | int ret; | |
722 | struct acpi_device *device; | |
723 | ||
724 | /* | |
725 | * Fixed hardware devices do not appear in the namespace and do not | |
726 | * have handles, but we fabricate acpi_devices for them, so we have | |
727 | * to deal with them specially. | |
728 | */ | |
729 | if (handle == NULL) | |
730 | return acpi_root; | |
731 | ||
732 | do { | |
733 | status = acpi_get_parent(handle, &handle); | |
734 | if (status == AE_NULL_ENTRY) | |
735 | return NULL; | |
736 | if (ACPI_FAILURE(status)) | |
737 | return acpi_root; | |
738 | ||
739 | ret = acpi_bus_get_device(handle, &device); | |
740 | if (ret == 0) | |
741 | return device; | |
742 | } while (1); | |
743 | } | |
744 | ||
9e89dde2 ZR |
745 | acpi_status |
746 | acpi_bus_get_ejd(acpi_handle handle, acpi_handle *ejd) | |
747 | { | |
748 | acpi_status status; | |
749 | acpi_handle tmp; | |
750 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; | |
751 | union acpi_object *obj; | |
752 | ||
753 | status = acpi_get_handle(handle, "_EJD", &tmp); | |
754 | if (ACPI_FAILURE(status)) | |
755 | return status; | |
756 | ||
757 | status = acpi_evaluate_object(handle, "_EJD", NULL, &buffer); | |
758 | if (ACPI_SUCCESS(status)) { | |
759 | obj = buffer.pointer; | |
3b5fee59 HM |
760 | status = acpi_get_handle(ACPI_ROOT_OBJECT, obj->string.pointer, |
761 | ejd); | |
9e89dde2 ZR |
762 | kfree(buffer.pointer); |
763 | } | |
764 | return status; | |
765 | } | |
766 | EXPORT_SYMBOL_GPL(acpi_bus_get_ejd); | |
767 | ||
8e4319c4 | 768 | void acpi_bus_data_handler(acpi_handle handle, void *context) |
9e89dde2 ZR |
769 | { |
770 | ||
771 | /* TBD */ | |
772 | ||
773 | return; | |
774 | } | |
775 | ||
9e89dde2 ZR |
776 | static int acpi_bus_get_perf_flags(struct acpi_device *device) |
777 | { | |
778 | device->performance.state = ACPI_STATE_UNKNOWN; | |
779 | return 0; | |
780 | } | |
781 | ||
782 | static acpi_status | |
b581a7f9 RW |
783 | acpi_bus_extract_wakeup_device_power_package(acpi_handle handle, |
784 | struct acpi_device_wakeup *wakeup) | |
9e89dde2 | 785 | { |
b581a7f9 RW |
786 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
787 | union acpi_object *package = NULL; | |
9e89dde2 | 788 | union acpi_object *element = NULL; |
b581a7f9 RW |
789 | acpi_status status; |
790 | int i = 0; | |
9e89dde2 | 791 | |
b581a7f9 | 792 | if (!wakeup) |
9e89dde2 ZR |
793 | return AE_BAD_PARAMETER; |
794 | ||
b581a7f9 RW |
795 | /* _PRW */ |
796 | status = acpi_evaluate_object(handle, "_PRW", NULL, &buffer); | |
797 | if (ACPI_FAILURE(status)) { | |
798 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PRW")); | |
799 | return status; | |
800 | } | |
801 | ||
802 | package = (union acpi_object *)buffer.pointer; | |
803 | ||
804 | if (!package || (package->package.count < 2)) { | |
805 | status = AE_BAD_DATA; | |
806 | goto out; | |
807 | } | |
808 | ||
9e89dde2 | 809 | element = &(package->package.elements[0]); |
b581a7f9 RW |
810 | if (!element) { |
811 | status = AE_BAD_DATA; | |
812 | goto out; | |
813 | } | |
9e89dde2 ZR |
814 | if (element->type == ACPI_TYPE_PACKAGE) { |
815 | if ((element->package.count < 2) || | |
816 | (element->package.elements[0].type != | |
817 | ACPI_TYPE_LOCAL_REFERENCE) | |
b581a7f9 RW |
818 | || (element->package.elements[1].type != ACPI_TYPE_INTEGER)) { |
819 | status = AE_BAD_DATA; | |
820 | goto out; | |
821 | } | |
822 | wakeup->gpe_device = | |
9e89dde2 | 823 | element->package.elements[0].reference.handle; |
b581a7f9 | 824 | wakeup->gpe_number = |
9e89dde2 ZR |
825 | (u32) element->package.elements[1].integer.value; |
826 | } else if (element->type == ACPI_TYPE_INTEGER) { | |
b581a7f9 RW |
827 | wakeup->gpe_device = NULL; |
828 | wakeup->gpe_number = element->integer.value; | |
829 | } else { | |
830 | status = AE_BAD_DATA; | |
831 | goto out; | |
832 | } | |
9e89dde2 ZR |
833 | |
834 | element = &(package->package.elements[1]); | |
835 | if (element->type != ACPI_TYPE_INTEGER) { | |
b581a7f9 RW |
836 | status = AE_BAD_DATA; |
837 | goto out; | |
9e89dde2 | 838 | } |
b581a7f9 | 839 | wakeup->sleep_state = element->integer.value; |
9e89dde2 ZR |
840 | |
841 | if ((package->package.count - 2) > ACPI_MAX_HANDLES) { | |
b581a7f9 RW |
842 | status = AE_NO_MEMORY; |
843 | goto out; | |
9e89dde2 | 844 | } |
b581a7f9 RW |
845 | wakeup->resources.count = package->package.count - 2; |
846 | for (i = 0; i < wakeup->resources.count; i++) { | |
9e89dde2 | 847 | element = &(package->package.elements[i + 2]); |
b581a7f9 RW |
848 | if (element->type != ACPI_TYPE_LOCAL_REFERENCE) { |
849 | status = AE_BAD_DATA; | |
850 | goto out; | |
851 | } | |
9e89dde2 | 852 | |
b581a7f9 | 853 | wakeup->resources.handles[i] = element->reference.handle; |
1da177e4 | 854 | } |
9e89dde2 | 855 | |
bba63a29 | 856 | acpi_setup_gpe_for_wake(handle, wakeup->gpe_device, wakeup->gpe_number); |
9874647b | 857 | |
b581a7f9 RW |
858 | out: |
859 | kfree(buffer.pointer); | |
860 | ||
861 | return status; | |
1da177e4 LT |
862 | } |
863 | ||
f517709d | 864 | static void acpi_bus_set_run_wake_flags(struct acpi_device *device) |
1da177e4 | 865 | { |
29b71a1c TR |
866 | struct acpi_device_id button_device_ids[] = { |
867 | {"PNP0C0D", 0}, | |
868 | {"PNP0C0C", 0}, | |
869 | {"PNP0C0E", 0}, | |
870 | {"", 0}, | |
871 | }; | |
f517709d RW |
872 | acpi_status status; |
873 | acpi_event_status event_status; | |
874 | ||
b67ea761 | 875 | device->wakeup.flags.notifier_present = 0; |
f517709d RW |
876 | |
877 | /* Power button, Lid switch always enable wakeup */ | |
878 | if (!acpi_match_device_ids(device, button_device_ids)) { | |
879 | device->wakeup.flags.run_wake = 1; | |
f2b56bc8 | 880 | device_set_wakeup_capable(&device->dev, true); |
f517709d RW |
881 | return; |
882 | } | |
883 | ||
e8e18c95 RW |
884 | status = acpi_get_gpe_status(device->wakeup.gpe_device, |
885 | device->wakeup.gpe_number, | |
886 | &event_status); | |
f517709d RW |
887 | if (status == AE_OK) |
888 | device->wakeup.flags.run_wake = | |
889 | !!(event_status & ACPI_EVENT_FLAG_HANDLE); | |
890 | } | |
891 | ||
d57d09a4 | 892 | static void acpi_bus_get_wakeup_device_flags(struct acpi_device *device) |
f517709d | 893 | { |
d57d09a4 | 894 | acpi_handle temp; |
f517709d | 895 | acpi_status status = 0; |
f517709d | 896 | int psw_error; |
29b71a1c | 897 | |
d57d09a4 RW |
898 | /* Presence of _PRW indicates wake capable */ |
899 | status = acpi_get_handle(device->handle, "_PRW", &temp); | |
900 | if (ACPI_FAILURE(status)) | |
901 | return; | |
902 | ||
b581a7f9 RW |
903 | status = acpi_bus_extract_wakeup_device_power_package(device->handle, |
904 | &device->wakeup); | |
9e89dde2 ZR |
905 | if (ACPI_FAILURE(status)) { |
906 | ACPI_EXCEPTION((AE_INFO, status, "Extracting _PRW package")); | |
d57d09a4 | 907 | return; |
9e89dde2 | 908 | } |
1da177e4 | 909 | |
9e89dde2 | 910 | device->wakeup.flags.valid = 1; |
9b83ccd2 | 911 | device->wakeup.prepare_count = 0; |
f517709d | 912 | acpi_bus_set_run_wake_flags(device); |
729b2bdb ZY |
913 | /* Call _PSW/_DSW object to disable its ability to wake the sleeping |
914 | * system for the ACPI device with the _PRW object. | |
915 | * The _PSW object is depreciated in ACPI 3.0 and is replaced by _DSW. | |
916 | * So it is necessary to call _DSW object first. Only when it is not | |
917 | * present will the _PSW object used. | |
918 | */ | |
77e76609 RW |
919 | psw_error = acpi_device_sleep_wake(device, 0, 0, 0); |
920 | if (psw_error) | |
921 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
922 | "error in _DSW or _PSW evaluation\n")); | |
1da177e4 | 923 | } |
1da177e4 | 924 | |
bf325f95 RW |
925 | static void acpi_bus_add_power_resource(acpi_handle handle); |
926 | ||
9e89dde2 | 927 | static int acpi_bus_get_power_flags(struct acpi_device *device) |
1da177e4 | 928 | { |
9e89dde2 ZR |
929 | acpi_status status = 0; |
930 | acpi_handle handle = NULL; | |
931 | u32 i = 0; | |
1a365616 | 932 | |
4be44fcd | 933 | |
9e89dde2 ZR |
934 | /* |
935 | * Power Management Flags | |
936 | */ | |
937 | status = acpi_get_handle(device->handle, "_PSC", &handle); | |
938 | if (ACPI_SUCCESS(status)) | |
939 | device->power.flags.explicit_get = 1; | |
940 | status = acpi_get_handle(device->handle, "_IRC", &handle); | |
941 | if (ACPI_SUCCESS(status)) | |
942 | device->power.flags.inrush_current = 1; | |
1da177e4 | 943 | |
9e89dde2 ZR |
944 | /* |
945 | * Enumerate supported power management states | |
946 | */ | |
1cc0c998 | 947 | for (i = ACPI_STATE_D0; i <= ACPI_STATE_D3_HOT; i++) { |
9e89dde2 ZR |
948 | struct acpi_device_power_state *ps = &device->power.states[i]; |
949 | char object_name[5] = { '_', 'P', 'R', '0' + i, '\0' }; | |
1da177e4 | 950 | |
9e89dde2 ZR |
951 | /* Evaluate "_PRx" to se if power resources are referenced */ |
952 | acpi_evaluate_reference(device->handle, object_name, NULL, | |
953 | &ps->resources); | |
954 | if (ps->resources.count) { | |
bf325f95 RW |
955 | int j; |
956 | ||
9e89dde2 | 957 | device->power.flags.power_resources = 1; |
bf325f95 RW |
958 | for (j = 0; j < ps->resources.count; j++) |
959 | acpi_bus_add_power_resource(ps->resources.handles[j]); | |
1da177e4 | 960 | } |
1da177e4 | 961 | |
9e89dde2 ZR |
962 | /* Evaluate "_PSx" to see if we can do explicit sets */ |
963 | object_name[2] = 'S'; | |
964 | status = acpi_get_handle(device->handle, object_name, &handle); | |
37239978 | 965 | if (ACPI_SUCCESS(status)) |
9e89dde2 | 966 | ps->flags.explicit_set = 1; |
1da177e4 | 967 | |
1cc0c998 LM |
968 | /* |
969 | * State is valid if there are means to put the device into it. | |
970 | * D3hot is only valid if _PR3 present. | |
971 | */ | |
972 | if (ps->resources.count || | |
973 | (ps->flags.explicit_set && i < ACPI_STATE_D3_HOT)) | |
9e89dde2 | 974 | ps->flags.valid = 1; |
1da177e4 | 975 | |
9e89dde2 ZR |
976 | ps->power = -1; /* Unknown - driver assigned */ |
977 | ps->latency = -1; /* Unknown - driver assigned */ | |
978 | } | |
1da177e4 | 979 | |
9e89dde2 ZR |
980 | /* Set defaults for D0 and D3 states (always valid) */ |
981 | device->power.states[ACPI_STATE_D0].flags.valid = 1; | |
982 | device->power.states[ACPI_STATE_D0].power = 100; | |
983 | device->power.states[ACPI_STATE_D3].flags.valid = 1; | |
984 | device->power.states[ACPI_STATE_D3].power = 0; | |
c8f7a62c | 985 | |
5c7dd710 RW |
986 | /* Set D3cold's explicit_set flag if _PS3 exists. */ |
987 | if (device->power.states[ACPI_STATE_D3_HOT].flags.explicit_set) | |
988 | device->power.states[ACPI_STATE_D3_COLD].flags.explicit_set = 1; | |
989 | ||
ade3e7fe | 990 | acpi_bus_init_power(device); |
c8f7a62c | 991 | |
9e89dde2 ZR |
992 | return 0; |
993 | } | |
c8f7a62c | 994 | |
4be44fcd | 995 | static int acpi_bus_get_flags(struct acpi_device *device) |
1da177e4 | 996 | { |
4be44fcd LB |
997 | acpi_status status = AE_OK; |
998 | acpi_handle temp = NULL; | |
1da177e4 | 999 | |
1da177e4 LT |
1000 | |
1001 | /* Presence of _STA indicates 'dynamic_status' */ | |
1002 | status = acpi_get_handle(device->handle, "_STA", &temp); | |
1003 | if (ACPI_SUCCESS(status)) | |
1004 | device->flags.dynamic_status = 1; | |
1005 | ||
1da177e4 LT |
1006 | /* Presence of _RMV indicates 'removable' */ |
1007 | status = acpi_get_handle(device->handle, "_RMV", &temp); | |
1008 | if (ACPI_SUCCESS(status)) | |
1009 | device->flags.removable = 1; | |
1010 | ||
1011 | /* Presence of _EJD|_EJ0 indicates 'ejectable' */ | |
1012 | status = acpi_get_handle(device->handle, "_EJD", &temp); | |
1013 | if (ACPI_SUCCESS(status)) | |
1014 | device->flags.ejectable = 1; | |
1015 | else { | |
1016 | status = acpi_get_handle(device->handle, "_EJ0", &temp); | |
1017 | if (ACPI_SUCCESS(status)) | |
1018 | device->flags.ejectable = 1; | |
1019 | } | |
1020 | ||
7bed50c5 RW |
1021 | /* Power resources cannot be power manageable. */ |
1022 | if (device->device_type == ACPI_BUS_TYPE_POWER) | |
1023 | return 0; | |
1024 | ||
1da177e4 LT |
1025 | /* Presence of _PS0|_PR0 indicates 'power manageable' */ |
1026 | status = acpi_get_handle(device->handle, "_PS0", &temp); | |
1027 | if (ACPI_FAILURE(status)) | |
1028 | status = acpi_get_handle(device->handle, "_PR0", &temp); | |
1029 | if (ACPI_SUCCESS(status)) | |
1030 | device->flags.power_manageable = 1; | |
1031 | ||
3c5f9be4 | 1032 | /* TBD: Performance management */ |
1da177e4 | 1033 | |
d550d98d | 1034 | return 0; |
1da177e4 LT |
1035 | } |
1036 | ||
c7bcb4e9 | 1037 | static void acpi_device_get_busid(struct acpi_device *device) |
1da177e4 | 1038 | { |
4be44fcd LB |
1039 | char bus_id[5] = { '?', 0 }; |
1040 | struct acpi_buffer buffer = { sizeof(bus_id), bus_id }; | |
1041 | int i = 0; | |
1da177e4 LT |
1042 | |
1043 | /* | |
1044 | * Bus ID | |
1045 | * ------ | |
1046 | * The device's Bus ID is simply the object name. | |
1047 | * TBD: Shouldn't this value be unique (within the ACPI namespace)? | |
1048 | */ | |
859ac9a4 | 1049 | if (ACPI_IS_ROOT_DEVICE(device)) { |
1da177e4 | 1050 | strcpy(device->pnp.bus_id, "ACPI"); |
859ac9a4 BH |
1051 | return; |
1052 | } | |
1053 | ||
1054 | switch (device->device_type) { | |
1da177e4 LT |
1055 | case ACPI_BUS_TYPE_POWER_BUTTON: |
1056 | strcpy(device->pnp.bus_id, "PWRF"); | |
1057 | break; | |
1058 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
1059 | strcpy(device->pnp.bus_id, "SLPF"); | |
1060 | break; | |
1061 | default: | |
66b7ed40 | 1062 | acpi_get_name(device->handle, ACPI_SINGLE_NAME, &buffer); |
1da177e4 LT |
1063 | /* Clean up trailing underscores (if any) */ |
1064 | for (i = 3; i > 1; i--) { | |
1065 | if (bus_id[i] == '_') | |
1066 | bus_id[i] = '\0'; | |
1067 | else | |
1068 | break; | |
1069 | } | |
1070 | strcpy(device->pnp.bus_id, bus_id); | |
1071 | break; | |
1072 | } | |
1073 | } | |
1074 | ||
54735266 ZR |
1075 | /* |
1076 | * acpi_bay_match - see if a device is an ejectable driver bay | |
1077 | * | |
1078 | * If an acpi object is ejectable and has one of the ACPI ATA methods defined, | |
1079 | * then we can safely call it an ejectable drive bay | |
1080 | */ | |
1081 | static int acpi_bay_match(struct acpi_device *device){ | |
1082 | acpi_status status; | |
1083 | acpi_handle handle; | |
1084 | acpi_handle tmp; | |
1085 | acpi_handle phandle; | |
1086 | ||
1087 | handle = device->handle; | |
1088 | ||
1089 | status = acpi_get_handle(handle, "_EJ0", &tmp); | |
1090 | if (ACPI_FAILURE(status)) | |
1091 | return -ENODEV; | |
1092 | ||
1093 | if ((ACPI_SUCCESS(acpi_get_handle(handle, "_GTF", &tmp))) || | |
1094 | (ACPI_SUCCESS(acpi_get_handle(handle, "_GTM", &tmp))) || | |
1095 | (ACPI_SUCCESS(acpi_get_handle(handle, "_STM", &tmp))) || | |
1096 | (ACPI_SUCCESS(acpi_get_handle(handle, "_SDD", &tmp)))) | |
1097 | return 0; | |
1098 | ||
1099 | if (acpi_get_parent(handle, &phandle)) | |
1100 | return -ENODEV; | |
1101 | ||
1102 | if ((ACPI_SUCCESS(acpi_get_handle(phandle, "_GTF", &tmp))) || | |
1103 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_GTM", &tmp))) || | |
1104 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_STM", &tmp))) || | |
1105 | (ACPI_SUCCESS(acpi_get_handle(phandle, "_SDD", &tmp)))) | |
1106 | return 0; | |
1107 | ||
1108 | return -ENODEV; | |
1109 | } | |
1110 | ||
3620f2f2 FS |
1111 | /* |
1112 | * acpi_dock_match - see if a device has a _DCK method | |
1113 | */ | |
1114 | static int acpi_dock_match(struct acpi_device *device) | |
1115 | { | |
1116 | acpi_handle tmp; | |
1117 | return acpi_get_handle(device->handle, "_DCK", &tmp); | |
1118 | } | |
1119 | ||
620e112c | 1120 | const char *acpi_device_hid(struct acpi_device *device) |
15b8dd53 | 1121 | { |
7f47fa6c | 1122 | struct acpi_hardware_id *hid; |
15b8dd53 | 1123 | |
2b2ae7c7 TR |
1124 | if (list_empty(&device->pnp.ids)) |
1125 | return dummy_hid; | |
1126 | ||
7f47fa6c BH |
1127 | hid = list_first_entry(&device->pnp.ids, struct acpi_hardware_id, list); |
1128 | return hid->id; | |
1129 | } | |
1130 | EXPORT_SYMBOL(acpi_device_hid); | |
15b8dd53 | 1131 | |
7f47fa6c BH |
1132 | static void acpi_add_id(struct acpi_device *device, const char *dev_id) |
1133 | { | |
1134 | struct acpi_hardware_id *id; | |
15b8dd53 | 1135 | |
7f47fa6c BH |
1136 | id = kmalloc(sizeof(*id), GFP_KERNEL); |
1137 | if (!id) | |
1138 | return; | |
15b8dd53 | 1139 | |
581de59e | 1140 | id->id = kstrdup(dev_id, GFP_KERNEL); |
7f47fa6c BH |
1141 | if (!id->id) { |
1142 | kfree(id); | |
1143 | return; | |
15b8dd53 BM |
1144 | } |
1145 | ||
7f47fa6c | 1146 | list_add_tail(&id->list, &device->pnp.ids); |
15b8dd53 BM |
1147 | } |
1148 | ||
222e82ac DW |
1149 | /* |
1150 | * Old IBM workstations have a DSDT bug wherein the SMBus object | |
1151 | * lacks the SMBUS01 HID and the methods do not have the necessary "_" | |
1152 | * prefix. Work around this. | |
1153 | */ | |
1154 | static int acpi_ibm_smbus_match(struct acpi_device *device) | |
1155 | { | |
1156 | acpi_handle h_dummy; | |
1157 | struct acpi_buffer path = {ACPI_ALLOCATE_BUFFER, NULL}; | |
1158 | int result; | |
1159 | ||
1160 | if (!dmi_name_in_vendors("IBM")) | |
1161 | return -ENODEV; | |
1162 | ||
1163 | /* Look for SMBS object */ | |
1164 | result = acpi_get_name(device->handle, ACPI_SINGLE_NAME, &path); | |
1165 | if (result) | |
1166 | return result; | |
1167 | ||
1168 | if (strcmp("SMBS", path.pointer)) { | |
1169 | result = -ENODEV; | |
1170 | goto out; | |
1171 | } | |
1172 | ||
1173 | /* Does it have the necessary (but misnamed) methods? */ | |
1174 | result = -ENODEV; | |
1175 | if (ACPI_SUCCESS(acpi_get_handle(device->handle, "SBI", &h_dummy)) && | |
1176 | ACPI_SUCCESS(acpi_get_handle(device->handle, "SBR", &h_dummy)) && | |
1177 | ACPI_SUCCESS(acpi_get_handle(device->handle, "SBW", &h_dummy))) | |
1178 | result = 0; | |
1179 | out: | |
1180 | kfree(path.pointer); | |
1181 | return result; | |
1182 | } | |
1183 | ||
c7bcb4e9 | 1184 | static void acpi_device_set_id(struct acpi_device *device) |
1da177e4 | 1185 | { |
4be44fcd | 1186 | acpi_status status; |
57f3674f BH |
1187 | struct acpi_device_info *info; |
1188 | struct acpica_device_id_list *cid_list; | |
7f47fa6c | 1189 | int i; |
1da177e4 | 1190 | |
c7bcb4e9 | 1191 | switch (device->device_type) { |
1da177e4 | 1192 | case ACPI_BUS_TYPE_DEVICE: |
859ac9a4 | 1193 | if (ACPI_IS_ROOT_DEVICE(device)) { |
57f3674f | 1194 | acpi_add_id(device, ACPI_SYSTEM_HID); |
859ac9a4 BH |
1195 | break; |
1196 | } | |
1197 | ||
66b7ed40 | 1198 | status = acpi_get_object_info(device->handle, &info); |
1da177e4 | 1199 | if (ACPI_FAILURE(status)) { |
96b2dd1f | 1200 | printk(KERN_ERR PREFIX "%s: Error reading device info\n", __func__); |
1da177e4 LT |
1201 | return; |
1202 | } | |
1203 | ||
1da177e4 | 1204 | if (info->valid & ACPI_VALID_HID) |
57f3674f BH |
1205 | acpi_add_id(device, info->hardware_id.string); |
1206 | if (info->valid & ACPI_VALID_CID) { | |
15b8dd53 | 1207 | cid_list = &info->compatible_id_list; |
57f3674f BH |
1208 | for (i = 0; i < cid_list->count; i++) |
1209 | acpi_add_id(device, cid_list->ids[i].string); | |
1210 | } | |
1da177e4 LT |
1211 | if (info->valid & ACPI_VALID_ADR) { |
1212 | device->pnp.bus_address = info->address; | |
1213 | device->flags.bus_address = 1; | |
1214 | } | |
ccf78040 LZ |
1215 | if (info->valid & ACPI_VALID_UID) |
1216 | device->pnp.unique_id = kstrdup(info->unique_id.string, | |
1217 | GFP_KERNEL); | |
ae843332 | 1218 | |
a83893ae BH |
1219 | kfree(info); |
1220 | ||
57f3674f BH |
1221 | /* |
1222 | * Some devices don't reliably have _HIDs & _CIDs, so add | |
1223 | * synthetic HIDs to make sure drivers can find them. | |
1224 | */ | |
c3d6de69 | 1225 | if (acpi_is_video_device(device)) |
57f3674f | 1226 | acpi_add_id(device, ACPI_VIDEO_HID); |
3620f2f2 | 1227 | else if (ACPI_SUCCESS(acpi_bay_match(device))) |
57f3674f | 1228 | acpi_add_id(device, ACPI_BAY_HID); |
3620f2f2 | 1229 | else if (ACPI_SUCCESS(acpi_dock_match(device))) |
57f3674f | 1230 | acpi_add_id(device, ACPI_DOCK_HID); |
222e82ac DW |
1231 | else if (!acpi_ibm_smbus_match(device)) |
1232 | acpi_add_id(device, ACPI_SMBUS_IBM_HID); | |
b7b30de5 BH |
1233 | else if (!acpi_device_hid(device) && |
1234 | ACPI_IS_ROOT_DEVICE(device->parent)) { | |
1235 | acpi_add_id(device, ACPI_BUS_HID); /* \_SB, LNXSYBUS */ | |
1236 | strcpy(device->pnp.device_name, ACPI_BUS_DEVICE_NAME); | |
1237 | strcpy(device->pnp.device_class, ACPI_BUS_CLASS); | |
1238 | } | |
54735266 | 1239 | |
1da177e4 LT |
1240 | break; |
1241 | case ACPI_BUS_TYPE_POWER: | |
57f3674f | 1242 | acpi_add_id(device, ACPI_POWER_HID); |
1da177e4 LT |
1243 | break; |
1244 | case ACPI_BUS_TYPE_PROCESSOR: | |
57f3674f | 1245 | acpi_add_id(device, ACPI_PROCESSOR_OBJECT_HID); |
1da177e4 | 1246 | break; |
1da177e4 | 1247 | case ACPI_BUS_TYPE_THERMAL: |
57f3674f | 1248 | acpi_add_id(device, ACPI_THERMAL_HID); |
1da177e4 LT |
1249 | break; |
1250 | case ACPI_BUS_TYPE_POWER_BUTTON: | |
57f3674f | 1251 | acpi_add_id(device, ACPI_BUTTON_HID_POWERF); |
1da177e4 LT |
1252 | break; |
1253 | case ACPI_BUS_TYPE_SLEEP_BUTTON: | |
57f3674f | 1254 | acpi_add_id(device, ACPI_BUTTON_HID_SLEEPF); |
1da177e4 LT |
1255 | break; |
1256 | } | |
1da177e4 LT |
1257 | } |
1258 | ||
bc3b0772 | 1259 | static int acpi_device_set_context(struct acpi_device *device) |
1da177e4 | 1260 | { |
bc3b0772 BH |
1261 | acpi_status status; |
1262 | ||
1da177e4 LT |
1263 | /* |
1264 | * Context | |
1265 | * ------- | |
1266 | * Attach this 'struct acpi_device' to the ACPI object. This makes | |
bc3b0772 BH |
1267 | * resolutions from handle->device very efficient. Fixed hardware |
1268 | * devices have no handles, so we skip them. | |
1da177e4 | 1269 | */ |
bc3b0772 BH |
1270 | if (!device->handle) |
1271 | return 0; | |
1da177e4 | 1272 | |
bc3b0772 BH |
1273 | status = acpi_attach_data(device->handle, |
1274 | acpi_bus_data_handler, device); | |
1275 | if (ACPI_SUCCESS(status)) | |
1276 | return 0; | |
1277 | ||
1278 | printk(KERN_ERR PREFIX "Error attaching device data\n"); | |
1279 | return -ENODEV; | |
1da177e4 LT |
1280 | } |
1281 | ||
4be44fcd | 1282 | static int acpi_bus_remove(struct acpi_device *dev, int rmdevice) |
1da177e4 | 1283 | { |
1da177e4 | 1284 | if (!dev) |
d550d98d | 1285 | return -EINVAL; |
1da177e4 | 1286 | |
96333578 | 1287 | dev->removal_type = ACPI_BUS_REMOVAL_EJECT; |
1890a97a | 1288 | device_release_driver(&dev->dev); |
1da177e4 LT |
1289 | |
1290 | if (!rmdevice) | |
d550d98d | 1291 | return 0; |
1da177e4 | 1292 | |
2786f6e3 RZ |
1293 | /* |
1294 | * unbind _ADR-Based Devices when hot removal | |
1295 | */ | |
1da177e4 LT |
1296 | if (dev->flags.bus_address) { |
1297 | if ((dev->parent) && (dev->parent->ops.unbind)) | |
1298 | dev->parent->ops.unbind(dev); | |
1299 | } | |
1da177e4 LT |
1300 | acpi_device_unregister(dev, ACPI_BUS_REMOVAL_EJECT); |
1301 | ||
d550d98d | 1302 | return 0; |
1da177e4 LT |
1303 | } |
1304 | ||
5c478f49 BH |
1305 | static int acpi_add_single_object(struct acpi_device **child, |
1306 | acpi_handle handle, int type, | |
778cbc1d | 1307 | unsigned long long sta, |
5c478f49 | 1308 | struct acpi_bus_ops *ops) |
1da177e4 | 1309 | { |
77c24888 BH |
1310 | int result; |
1311 | struct acpi_device *device; | |
29aaefa6 | 1312 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; |
1da177e4 | 1313 | |
36bcbec7 | 1314 | device = kzalloc(sizeof(struct acpi_device), GFP_KERNEL); |
1da177e4 | 1315 | if (!device) { |
6468463a | 1316 | printk(KERN_ERR PREFIX "Memory allocation error\n"); |
d550d98d | 1317 | return -ENOMEM; |
1da177e4 | 1318 | } |
1da177e4 | 1319 | |
7f47fa6c | 1320 | INIT_LIST_HEAD(&device->pnp.ids); |
caaa6efb | 1321 | device->device_type = type; |
1da177e4 | 1322 | device->handle = handle; |
5c478f49 | 1323 | device->parent = acpi_bus_get_parent(handle); |
c4168bff | 1324 | device->bus_ops = *ops; /* workround for not call .start */ |
778cbc1d | 1325 | STRUCT_TO_INT(device->status) = sta; |
c4168bff | 1326 | |
c7bcb4e9 | 1327 | acpi_device_get_busid(device); |
1da177e4 LT |
1328 | |
1329 | /* | |
1330 | * Flags | |
1331 | * ----- | |
778cbc1d BH |
1332 | * Note that we only look for object handles -- cannot evaluate objects |
1333 | * until we know the device is present and properly initialized. | |
1da177e4 LT |
1334 | */ |
1335 | result = acpi_bus_get_flags(device); | |
1336 | if (result) | |
1337 | goto end; | |
1338 | ||
1da177e4 LT |
1339 | /* |
1340 | * Initialize Device | |
1341 | * ----------------- | |
1342 | * TBD: Synch with Core's enumeration/initialization process. | |
1343 | */ | |
c7bcb4e9 | 1344 | acpi_device_set_id(device); |
1da177e4 LT |
1345 | |
1346 | /* | |
1347 | * Power Management | |
1348 | * ---------------- | |
1349 | */ | |
1350 | if (device->flags.power_manageable) { | |
1351 | result = acpi_bus_get_power_flags(device); | |
1352 | if (result) | |
1353 | goto end; | |
1354 | } | |
1355 | ||
4be44fcd | 1356 | /* |
1da177e4 LT |
1357 | * Wakeup device management |
1358 | *----------------------- | |
1359 | */ | |
d57d09a4 | 1360 | acpi_bus_get_wakeup_device_flags(device); |
1da177e4 LT |
1361 | |
1362 | /* | |
1363 | * Performance Management | |
1364 | * ---------------------- | |
1365 | */ | |
1366 | if (device->flags.performance_manageable) { | |
1367 | result = acpi_bus_get_perf_flags(device); | |
1368 | if (result) | |
1369 | goto end; | |
1370 | } | |
1371 | ||
bc3b0772 | 1372 | if ((result = acpi_device_set_context(device))) |
f61f9258 | 1373 | goto end; |
1da177e4 | 1374 | |
66b7ed40 | 1375 | result = acpi_device_register(device); |
1da177e4 LT |
1376 | |
1377 | /* | |
2786f6e3 | 1378 | * Bind _ADR-Based Devices when hot add |
1da177e4 LT |
1379 | */ |
1380 | if (device->flags.bus_address) { | |
1381 | if (device->parent && device->parent->ops.bind) | |
1382 | device->parent->ops.bind(device); | |
1383 | } | |
1384 | ||
0c526d96 | 1385 | end: |
29aaefa6 BH |
1386 | if (!result) { |
1387 | acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer); | |
1388 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
1389 | "Adding %s [%s] parent %s\n", dev_name(&device->dev), | |
1390 | (char *) buffer.pointer, | |
1391 | device->parent ? dev_name(&device->parent->dev) : | |
1392 | "(null)")); | |
1393 | kfree(buffer.pointer); | |
1da177e4 | 1394 | *child = device; |
29aaefa6 | 1395 | } else |
718fb0de | 1396 | acpi_device_release(&device->dev); |
1da177e4 | 1397 | |
d550d98d | 1398 | return result; |
1da177e4 | 1399 | } |
1da177e4 | 1400 | |
778cbc1d BH |
1401 | #define ACPI_STA_DEFAULT (ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED | \ |
1402 | ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING) | |
1403 | ||
bf325f95 RW |
1404 | static void acpi_bus_add_power_resource(acpi_handle handle) |
1405 | { | |
1406 | struct acpi_bus_ops ops = { | |
1407 | .acpi_op_add = 1, | |
1408 | .acpi_op_start = 1, | |
1409 | }; | |
1410 | struct acpi_device *device = NULL; | |
1411 | ||
1412 | acpi_bus_get_device(handle, &device); | |
1413 | if (!device) | |
1414 | acpi_add_single_object(&device, handle, ACPI_BUS_TYPE_POWER, | |
1415 | ACPI_STA_DEFAULT, &ops); | |
1416 | } | |
1417 | ||
778cbc1d BH |
1418 | static int acpi_bus_type_and_status(acpi_handle handle, int *type, |
1419 | unsigned long long *sta) | |
1da177e4 | 1420 | { |
778cbc1d BH |
1421 | acpi_status status; |
1422 | acpi_object_type acpi_type; | |
1da177e4 | 1423 | |
778cbc1d | 1424 | status = acpi_get_type(handle, &acpi_type); |
51a85faf | 1425 | if (ACPI_FAILURE(status)) |
778cbc1d | 1426 | return -ENODEV; |
4be44fcd | 1427 | |
778cbc1d | 1428 | switch (acpi_type) { |
51a85faf BH |
1429 | case ACPI_TYPE_ANY: /* for ACPI_ROOT_OBJECT */ |
1430 | case ACPI_TYPE_DEVICE: | |
778cbc1d BH |
1431 | *type = ACPI_BUS_TYPE_DEVICE; |
1432 | status = acpi_bus_get_status_handle(handle, sta); | |
1433 | if (ACPI_FAILURE(status)) | |
1434 | return -ENODEV; | |
51a85faf BH |
1435 | break; |
1436 | case ACPI_TYPE_PROCESSOR: | |
778cbc1d BH |
1437 | *type = ACPI_BUS_TYPE_PROCESSOR; |
1438 | status = acpi_bus_get_status_handle(handle, sta); | |
1439 | if (ACPI_FAILURE(status)) | |
1440 | return -ENODEV; | |
51a85faf BH |
1441 | break; |
1442 | case ACPI_TYPE_THERMAL: | |
778cbc1d BH |
1443 | *type = ACPI_BUS_TYPE_THERMAL; |
1444 | *sta = ACPI_STA_DEFAULT; | |
51a85faf BH |
1445 | break; |
1446 | case ACPI_TYPE_POWER: | |
778cbc1d BH |
1447 | *type = ACPI_BUS_TYPE_POWER; |
1448 | *sta = ACPI_STA_DEFAULT; | |
51a85faf BH |
1449 | break; |
1450 | default: | |
778cbc1d | 1451 | return -ENODEV; |
51a85faf | 1452 | } |
1da177e4 | 1453 | |
778cbc1d BH |
1454 | return 0; |
1455 | } | |
1456 | ||
1457 | static acpi_status acpi_bus_check_add(acpi_handle handle, u32 lvl, | |
1458 | void *context, void **return_value) | |
1459 | { | |
1460 | struct acpi_bus_ops *ops = context; | |
778cbc1d BH |
1461 | int type; |
1462 | unsigned long long sta; | |
e3b87f8a BH |
1463 | struct acpi_device *device; |
1464 | acpi_status status; | |
778cbc1d BH |
1465 | int result; |
1466 | ||
1467 | result = acpi_bus_type_and_status(handle, &type, &sta); | |
1468 | if (result) | |
1469 | return AE_OK; | |
1470 | ||
1471 | if (!(sta & ACPI_STA_DEVICE_PRESENT) && | |
b581a7f9 | 1472 | !(sta & ACPI_STA_DEVICE_FUNCTIONING)) { |
86e4e20e RW |
1473 | struct acpi_device_wakeup wakeup; |
1474 | acpi_handle temp; | |
1475 | ||
1476 | status = acpi_get_handle(handle, "_PRW", &temp); | |
1477 | if (ACPI_SUCCESS(status)) | |
1478 | acpi_bus_extract_wakeup_device_power_package(handle, | |
1479 | &wakeup); | |
778cbc1d | 1480 | return AE_CTRL_DEPTH; |
b581a7f9 | 1481 | } |
778cbc1d | 1482 | |
e3b87f8a BH |
1483 | /* |
1484 | * We may already have an acpi_device from a previous enumeration. If | |
1485 | * so, we needn't add it again, but we may still have to start it. | |
1486 | */ | |
1487 | device = NULL; | |
1488 | acpi_bus_get_device(handle, &device); | |
1489 | if (ops->acpi_op_add && !device) | |
1490 | acpi_add_single_object(&device, handle, type, sta, ops); | |
1da177e4 | 1491 | |
e3b87f8a | 1492 | if (!device) |
51a85faf | 1493 | return AE_CTRL_DEPTH; |
1da177e4 | 1494 | |
51a85faf BH |
1495 | if (ops->acpi_op_start && !(ops->acpi_op_add)) { |
1496 | status = acpi_start_single_object(device); | |
1da177e4 | 1497 | if (ACPI_FAILURE(status)) |
51a85faf BH |
1498 | return AE_CTRL_DEPTH; |
1499 | } | |
1da177e4 | 1500 | |
51a85faf BH |
1501 | if (!*return_value) |
1502 | *return_value = device; | |
1503 | return AE_OK; | |
1504 | } | |
3fb02738 | 1505 | |
51a85faf BH |
1506 | static int acpi_bus_scan(acpi_handle handle, struct acpi_bus_ops *ops, |
1507 | struct acpi_device **child) | |
1508 | { | |
1509 | acpi_status status; | |
51a85faf | 1510 | void *device = NULL; |
3fb02738 | 1511 | |
51a85faf BH |
1512 | status = acpi_bus_check_add(handle, 0, ops, &device); |
1513 | if (ACPI_SUCCESS(status)) | |
1514 | acpi_walk_namespace(ACPI_TYPE_ANY, handle, ACPI_UINT32_MAX, | |
2263576c | 1515 | acpi_bus_check_add, NULL, ops, &device); |
1da177e4 | 1516 | |
51a85faf BH |
1517 | if (child) |
1518 | *child = device; | |
7779688f TR |
1519 | |
1520 | if (device) | |
1521 | return 0; | |
1522 | else | |
1523 | return -ENODEV; | |
1da177e4 | 1524 | } |
1da177e4 | 1525 | |
7779688f TR |
1526 | /* |
1527 | * acpi_bus_add and acpi_bus_start | |
1528 | * | |
1529 | * scan a given ACPI tree and (probably recently hot-plugged) | |
1530 | * create and add or starts found devices. | |
1531 | * | |
1532 | * If no devices were found -ENODEV is returned which does not | |
1533 | * mean that this is a real error, there just have been no suitable | |
1534 | * ACPI objects in the table trunk from which the kernel could create | |
1535 | * a device and add/start an appropriate driver. | |
1536 | */ | |
1537 | ||
3fb02738 | 1538 | int |
4be44fcd LB |
1539 | acpi_bus_add(struct acpi_device **child, |
1540 | struct acpi_device *parent, acpi_handle handle, int type) | |
3fb02738 | 1541 | { |
3fb02738 RS |
1542 | struct acpi_bus_ops ops; |
1543 | ||
c4168bff LS |
1544 | memset(&ops, 0, sizeof(ops)); |
1545 | ops.acpi_op_add = 1; | |
3fb02738 | 1546 | |
7779688f | 1547 | return acpi_bus_scan(handle, &ops, child); |
3fb02738 RS |
1548 | } |
1549 | EXPORT_SYMBOL(acpi_bus_add); | |
1550 | ||
4be44fcd | 1551 | int acpi_bus_start(struct acpi_device *device) |
3fb02738 | 1552 | { |
3fb02738 | 1553 | struct acpi_bus_ops ops; |
a2100801 | 1554 | int result; |
3fb02738 | 1555 | |
d2f6650a TR |
1556 | if (!device) |
1557 | return -EINVAL; | |
1558 | ||
8e029bf0 BH |
1559 | memset(&ops, 0, sizeof(ops)); |
1560 | ops.acpi_op_start = 1; | |
3fb02738 | 1561 | |
a2100801 RW |
1562 | result = acpi_bus_scan(device->handle, &ops, NULL); |
1563 | ||
3a37898d | 1564 | acpi_update_all_gpes(); |
a2100801 RW |
1565 | |
1566 | return result; | |
3fb02738 RS |
1567 | } |
1568 | EXPORT_SYMBOL(acpi_bus_start); | |
1da177e4 | 1569 | |
ceaba663 | 1570 | int acpi_bus_trim(struct acpi_device *start, int rmdevice) |
1da177e4 | 1571 | { |
4be44fcd LB |
1572 | acpi_status status; |
1573 | struct acpi_device *parent, *child; | |
1574 | acpi_handle phandle, chandle; | |
1575 | acpi_object_type type; | |
1576 | u32 level = 1; | |
1577 | int err = 0; | |
1578 | ||
1579 | parent = start; | |
1da177e4 LT |
1580 | phandle = start->handle; |
1581 | child = chandle = NULL; | |
1582 | ||
1583 | while ((level > 0) && parent && (!err)) { | |
1584 | status = acpi_get_next_object(ACPI_TYPE_ANY, phandle, | |
4be44fcd | 1585 | chandle, &chandle); |
1da177e4 LT |
1586 | |
1587 | /* | |
1588 | * If this scope is exhausted then move our way back up. | |
1589 | */ | |
1590 | if (ACPI_FAILURE(status)) { | |
1591 | level--; | |
1592 | chandle = phandle; | |
1593 | acpi_get_parent(phandle, &phandle); | |
1594 | child = parent; | |
1595 | parent = parent->parent; | |
1596 | ||
1597 | if (level == 0) | |
1598 | err = acpi_bus_remove(child, rmdevice); | |
1599 | else | |
1600 | err = acpi_bus_remove(child, 1); | |
1601 | ||
1602 | continue; | |
1603 | } | |
1604 | ||
1605 | status = acpi_get_type(chandle, &type); | |
1606 | if (ACPI_FAILURE(status)) { | |
1607 | continue; | |
1608 | } | |
1609 | /* | |
1610 | * If there is a device corresponding to chandle then | |
1611 | * parse it (depth-first). | |
1612 | */ | |
1613 | if (acpi_bus_get_device(chandle, &child) == 0) { | |
1614 | level++; | |
1615 | phandle = chandle; | |
1616 | chandle = NULL; | |
1617 | parent = child; | |
1618 | } | |
1619 | continue; | |
1620 | } | |
1621 | return err; | |
1622 | } | |
ceaba663 KA |
1623 | EXPORT_SYMBOL_GPL(acpi_bus_trim); |
1624 | ||
e8b945c9 | 1625 | static int acpi_bus_scan_fixed(void) |
1da177e4 | 1626 | { |
4be44fcd LB |
1627 | int result = 0; |
1628 | struct acpi_device *device = NULL; | |
c4168bff | 1629 | struct acpi_bus_ops ops; |
1da177e4 | 1630 | |
c4168bff LS |
1631 | memset(&ops, 0, sizeof(ops)); |
1632 | ops.acpi_op_add = 1; | |
1633 | ops.acpi_op_start = 1; | |
1634 | ||
1da177e4 LT |
1635 | /* |
1636 | * Enumerate all fixed-feature devices. | |
1637 | */ | |
cee324b1 | 1638 | if ((acpi_gbl_FADT.flags & ACPI_FADT_POWER_BUTTON) == 0) { |
5c478f49 | 1639 | result = acpi_add_single_object(&device, NULL, |
c4168bff | 1640 | ACPI_BUS_TYPE_POWER_BUTTON, |
778cbc1d | 1641 | ACPI_STA_DEFAULT, |
c4168bff | 1642 | &ops); |
c10d7a13 | 1643 | device_init_wakeup(&device->dev, true); |
3fb02738 | 1644 | } |
1da177e4 | 1645 | |
cee324b1 | 1646 | if ((acpi_gbl_FADT.flags & ACPI_FADT_SLEEP_BUTTON) == 0) { |
5c478f49 | 1647 | result = acpi_add_single_object(&device, NULL, |
c4168bff | 1648 | ACPI_BUS_TYPE_SLEEP_BUTTON, |
778cbc1d | 1649 | ACPI_STA_DEFAULT, |
c4168bff | 1650 | &ops); |
3fb02738 | 1651 | } |
1da177e4 | 1652 | |
d550d98d | 1653 | return result; |
1da177e4 LT |
1654 | } |
1655 | ||
e747f274 | 1656 | int __init acpi_scan_init(void) |
1da177e4 LT |
1657 | { |
1658 | int result; | |
3fb02738 | 1659 | struct acpi_bus_ops ops; |
1da177e4 | 1660 | |
c4168bff LS |
1661 | memset(&ops, 0, sizeof(ops)); |
1662 | ops.acpi_op_add = 1; | |
1663 | ops.acpi_op_start = 1; | |
1da177e4 | 1664 | |
5b327265 PM |
1665 | result = bus_register(&acpi_bus_type); |
1666 | if (result) { | |
1667 | /* We don't want to quit even if we failed to add suspend/resume */ | |
1668 | printk(KERN_ERR PREFIX "Could not register bus type\n"); | |
1669 | } | |
1670 | ||
97d9a9e9 RW |
1671 | acpi_power_init(); |
1672 | ||
1da177e4 LT |
1673 | /* |
1674 | * Enumerate devices in the ACPI namespace. | |
1675 | */ | |
51a85faf | 1676 | result = acpi_bus_scan(ACPI_ROOT_OBJECT, &ops, &acpi_root); |
c04209a7 | 1677 | |
c4168bff | 1678 | if (!result) |
adc08e20 | 1679 | result = acpi_bus_scan_fixed(); |
1da177e4 LT |
1680 | |
1681 | if (result) | |
1682 | acpi_device_unregister(acpi_root, ACPI_BUS_REMOVAL_NORMAL); | |
a2100801 | 1683 | else |
3a37898d | 1684 | acpi_update_all_gpes(); |
1da177e4 | 1685 | |
d550d98d | 1686 | return result; |
1da177e4 | 1687 | } |